Further confirmation that Adams and Styles saw people running from the fourth floor window:
CE 1381 Sandra Styles statement to the FBI (March 19, 1964):
I recall that on the afternoon of November 22, 1963, while watching the motorcade at sometime between 12 :15 PM and 12:30 PM, possibly about 12:20 I heard shots but thought at the time that they were fireworks . I was unaware of the place
the shots came from . I saw people running and others lie down on the ground and realized something was happening but did not know exactly what was happening. VICTORIA ADAMS and I left the office at this time, went down the back stairs and left the building at the back door .
Combine this with Adams’ CE1381 statement:
“Sandra Styles and I then ran out of the building via the stairs and went in the direction of the railroad where we had observed other people running.“
It appears obvious to me that they were still at the fourth floor window when they observed people were running toward the railroad yards. And that this observation caused them to decide to go to the back stairs and door instead of out the front door via the elevator to Elm Street.